Yes many skills transfer. Like how one ane write C++ from readin the docs without ever learning C++ or how one can write C++ having only ever learned C. The part you're missing is that it doesn't make you any good in C++, in fact I'd argue that it makes you terrible if you're going to try to write X code in Y language. The fact that it's entry-level doesn't mean anything. A lot of times these entry-level jobs aren't something you can just go and start pasting code together.